(1 中国建筑科学研究院有限公司, 北京 100013; 2 北京京江国际工程咨询有限公司, 北京 100086;3 中国建筑第八工程局有限公司, 上海 200135)

摘要: 国家会展中心(天津)工程一、二期之间跨越市政道路的两座人行天桥均为大跨度人行天桥,外观及功能相同,但由于 1#人行天桥下市政管线复杂,相比 2#人行天桥少一个桥墩,其跨度更大,最大跨度达到 90. 2m,且两座人行天桥扶梯楼梯等附属结构多,结构设计更复杂. 以较大跨度的 1#人行天桥为例,介绍了钢结构大跨度人行天桥的主要设计要点,采用 MIDAS 软件对 1#人行天桥进行了结构受力分析,同时对人行舒适度进行验算. 分析结果表明:1#人行天桥结构体系刚度均匀,整体性良好,设计合理;大跨度钢桁架在跨中和支座处的受力较大,需要适当加强;1#人行天桥的各项验算结果能够满足设计需求.

关键词: 国家会展中心(天津); 大跨度人行天桥; 钢结构设计; 舒适度分析

中图分类号:TU997 文献标志码:A 文章编号:1002⁃848X(2022)16⁃0050⁃05

DOI:10. 19701 / j. jzjg. LS210062

Design of large⁃span pedestrian bridge in National Convention and Exhibition Center (Tianjin) project

LIU Hao1, ZHAO Jianguo1, LI Ding2, REN Kai2, ZHOU Lei3

(1 China Academy of Building Research Co. , Ltd. , Beijing 100013, China; 2 Beijing Jingjiang InternationalConstruction Consulting Co. , Ltd. , Beijing 100086, China; 3 China Construction Eighth Engineering DivisionCo. , Ltd. , Shanghai 200135, China)

Abstract: The two pedestrian bridges spanning municipal roads between the first and second phases of the NationalConvention and Exhibition Center ( Tianjin) project are long⁃span pedestrian bridges with the same appearance andfunction, but due to the complexity of municipal pipelines under the 1# pedestrian bridge, there is one less pier and largerspan than 2# pedestrian bridges, the maximum span of the 1# pedestrian bridge reaches 90. 2m. There are many auxiliarystructures such as escalators and stairs on the two pedestrian bridges, and the structural design is more complicated. Takingthe 1# pedestrian bridge with a large span as an example, the main design points of the steel structure long⁃span pedestrianbridge were introduced. MIDAS was used to analyze the structural force analysis of the pedestrian bridge and the pedestriancomfort was checked. The results show that the 1# pedestrian bridge has uniform stiffness, good integrity and reasonabledesign. The long⁃span steel truss has a large force at the mid⁃span and the support, which needs to be properlystrengthened. The verification results of the 1# pedestrian bridge can meet the design requirements.

Keywords:National Convention and Exhibition Center ( Tianjin); large⁃span pedestrian bridge; steel structural design;comfort analysis

第一作者:刘浩,硕士,工程师,主要从事建筑结构设计工作,Email:liuhao@ cabr⁃design. com.

[引用本文] 刘浩,赵建国,李鼎,等. 国家会展中心(天津) 工程大跨度人行天桥设计[ J]. 建筑结构,2022,52(16):50⁃54,106. LIU Hao,ZHAO Jianguo,LI Ding,et al. Design of large⁃span pedestrian bridge in National Conventionand Exhibition Center (Tianjin) project[J]. Building Structure,2022,52(16):50⁃54,106.